Results 11 to 20 of about 4,229,081 (350)
Teleporting an unknown quantum state via dual classical and Einstein-Podolsky-Rosen channels [PDF]
Physical Review Letters, 1993 An unknown quantum state \ensuremath{\Vert}\ensuremath{\varphi}〉 can be disassembled into, then later reconstructed from, purely classical information and purely nonclassical Einstein-Podolsky-Rosen (EPR) correlations. To do so the sender, ``Alice,'' and
Charles H. Bennett +5 more
openalex +2 more sources
On contraction coefficients, partial orders and approximation of capacities for quantum channels [PDF]
Quantum, 2022 The data processing inequality is the most basic requirement for any meaningful measure of information. It essentially states that distinguishability measures between states decrease if we apply a quantum channel and is the centerpiece of many results in
Christoph Hirche +2 more
doaj +3 more sources
Communication through coherent control of quantum channels [PDF]
Quantum, 2020 A completely depolarising quantum channel always outputs a fully mixed state and thus cannot transmit any information. In a recent Letter\cite{ebler18}, it was however shown that if a quantum state passes through two such channels in a quantum ...
Alastair A. Abbott +4 more
doaj +3 more sources
Operational resource theory of quantum channels [PDF]
Physical Review Research, 2020 Quantum resource theories have been widely studied to systematically characterize the nonclassicality of quantum systems. Most resource theories focus on quantum states and study their interconversions.
Yunchao Liu, Xiao Yuan
doaj +2 more sources
Detecting positive quantum capacities of quantum channels [PDF]
npj Quantum Information, 2022 Determining whether a noisy quantum channel can be used to reliably transmit quantum information is a challenging problem in quantum information theory. This is because it requires computation of the channel’s coherent information for an unbounded number
Satvik Singh, Nilanjana Datta
doaj +2 more sources
Optimal teleportation via noisy quantum channels without additional qubit resources
npj Quantum Information, 2021 Quantum teleportation exemplifies how the transmission of quantum information starkly differs from that of classical information and serves as a key protocol for quantum communication and quantum computing.
Dong-Gil Im +6 more
doaj +2 more sources
Coherence of quantum channels [PDF]
Phys. Rev. A 100, 052311 (2019), 2019 We investigate the coherence of quantum channels and establish a resource theory for quantifying the coherence of quantum channels via Choi matrix. To this aim, we define the incoherent channels and incoherent superchannels. This theory recovers the case of quantum states when we view quantum states as a special case of quantum channels and also, this ...
Jianwei Xu
arxiv +3 more sources
Jordan products of quantum channels and their compatibility. [PDF]
Nat Commun, 2021 Given two quantum channels, we examine the task of determining whether they are compatible—meaning that one can perform both channels simultaneously but, in the future, choose exactly one channel whose output is desired (while forfeiting the output of ...
Girard M, Plávala M, Sikora J.
europepmc +3 more sources
Quantifying the magic of quantum channels [PDF]
New Journal of Physics, 2019 To achieve universal quantum computation via general fault-tolerant schemes, stabilizer operations must be supplemented with other non-stabilizer quantum resources.
Xin Wang, Mark M Wilde, Yuan Su
doaj +2 more sources
Necessary and sufficient conditions on measurements of quantum channels. [PDF]
Proc Math Phys Eng Sci, 2020 Quantum supermaps are a higher-order genera- lization of quantum maps, taking quantum maps to quantum maps. It is known that any completely positive and trace non-increasing (CPTNI) map can be performed as part of a quantum measurement.
Burniston J +4 more
europepmc +3 more sources